MCUBOOT Application preventing further dfu.

RE: MCUBOOT Application preventing further dfu.

Einar Thorsrud — Fri, 17 Apr 2026 12:11:04 GMT

Hi,

I do not see a way to solve this. I see you do not have an additional bootloader, to MCUBoot is immutable. And so the partition layout seen from MCUboot will always remain the same for devices in he field. If you were to place the settings partition anywhere in the application slot that will cause problems, as it will be part of the calculation when validating the image. If you had free space that was not currently used for application slots that could have been a possibility, but that does not seem to be the case.

RE: MCUBOOT Application preventing further dfu.

Andrew Sanders — Thu, 16 Apr 2026 14:28:23 GMT

Hello, circling back on this issue. Is there an easy and builtin way to move the settings partition away from the end of flash that does not interfere with the image trailer?

RE: MCUBOOT Application preventing further dfu.

Einar Thorsrud — Fri, 20 Mar 2026 13:33:32 GMT

Hi,

I see the partition layout is changed, shrinking both application slots equally to be able to fit a settings region. Changing parition layout in the field is not recommended and will cause problems. In this case, MCUboot which is not updated will use the old partition layout. It is difficult to solve this in a good way for products out in the field (other than sticking with the old partition layout and not using settings).